import { LRUCache as LRU } from 'lru-cache';
import { Document as TypeDocument } from 'greybel-type-analyzer';
import { IActiveDocument } from '../../types';
export declare class DocumentMergerCache {
    readonly typeDocuments: LRU<number, TypeDocument>;
    private keyToDocumentUriMap;
    constructor();
    createCacheKey(source: IActiveDocument, documents: IActiveDocument[]): number;
    registerCacheKey(key: number, documentUri: string): void;
    flushCacheKey(documentUri: string): void;
    flushCache(): void;
}